Re-export bech32

[benthecarman]

In the upgrade to rust-bitcoin 0.31, bech32 is no longer re-exported. This is needed for the u5 type by the NodeSigner for the sign_invoice function. This just re-exports the bech32 crate to handle this.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.70%. Comparing base (a76ec06) to head (3beb16c). Report is 1064 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3208      +/-   ##
==========================================
- Coverage   89.80%   89.70%   -0.11%     
==========================================
  Files         122      122              
  Lines      101621   101791     +170     
  Branches   101621   101791     +170     
==========================================
+ Hits        91261    91311      +50     
- Misses       7674     7782     +108     
- Partials     2686     2698      +12     

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[tnull]

Would probably make sense to do this as part of / after https://github.com/lightningdevkit/rust-lightning/pull/3201 ? (cc @optout21)

[TheBlueMatt]

Yea, we'll see what happens in that PR first, then we can revisit this I think. I kinda hate the re-exporting thing, but maybe others have different opinions.

[TheBlueMatt]

Closing as abandoned. We shouldn't need this post-0.32.